Hi, doing dome looking for you, the first I see John Mills mentioned is in a book of Preble OCunty History, and it states he came to Somers Township in1818! Thepage reads,John and Mary Mills, from York COunty Penn, settled in 1818, upon the southeast quarter of section nineteen! John Mills was one of the early justices of the peace,andquite a prominent man! He died in 1835 at the ageof seventy three! Peter Sheafer, son in law of Mills, came from Lancaster co Penn in 1819. and settled in thesame part ofof the township. He was a miller by trade,and operated various mills. Among them, the Bruce Mill at Eaton, Gasper's Potterf's in Gasper, JOne's mill in Somers, and the McClurg Mill north of Camden, and one built bu himself on the creek south of camden! He was in Illinois from 1838 to 1847. He died in 1861 at the age of66. J M Sheafer, esq, of Camden is the son in law of Peter Mills.
It is noted in this book, that John M Sheafer was a trustee in the presbyterian church in SOmers Twp.
A swamill was also built and run two and a half miles west of Camden by John Mills and his son Amos.